Monocultures

Consider this:

A field of wheat. Six billion identical heads, rippling in uniform waves in a gentle breeze. Provided with all that is considered necessary for their wellbeing. All primed for maximum productivity.
Total population: six billion

Now consider this:

A field of wheat. The nodding heads are a little fewer, and, perhaps, smaller.
Some signs of nibbling here and there as fieldmice partake of the bounty, taking the leftovers back to their young in nests suspended between the nodding stems
Weeds grow among the stems. Cornflowers provide startling blue highlights among the muted gold.
There are bees.
Total population: six billion (not all wheat)

Which would you rather?